Plane.



No. 814,718. PATENTED MAR. 13, 1906.

G. E. MITCHELL.

PLANE. AYPLIGATION FILED MAR.Z6.1902.

2 SHEETS-SHEET 1- AlZbr/zey- No. 814,718. PATENTED MAR. 13, 1906. O. E.MITCHELL.

PLANE.

APPLICATION FILED 11.4mm 19oz.

2 sums-sum: 2.

LUWUHL 'T'I'M 'L EL; I I I I LII w I In! f I I I .1. JIL

WTNEEEEE: INVENTEJR UNITED STATES FATENT orFIoE.

PLANE.

Specification of Letters Patent.

ratented Maren 13, 1906.

Application filedMarch 26, 1902. Serial No. 100,012.

To all whom, it may concern.-

Be it known that I, CHARLES E. Mrrorr- ELL, a citizen of the UnitedStates, residing at New York city, county and State of New York, haveinvented certain new and useful Improvements in Planes, of which thefollowing is a full, clear, and exact description.

My invention relates to planes.

Among the main objects of my invention are to provide a planeconstruction which is simple, inexpensive, effective, and durable. Theseobjects I attain by the use of a new form and arrangement of partspermitting the employment of wrought or sheet metal in the formation ofseveral of the important elements.

In the drawings, Figure 1 is a side elevation of a plane embodying myinvention. Fig. 2 is a longitudinal section through the same. Fig. 3 isa front elevation. Fig. 4 is a perspective view of a detail. Fig. 5 is aperspective view of another detail. Fig. 6 is a plan view of a blank.Fig. 7 is a perspective view of said blank after it has been partiallyformed. Fig. 8 is a perspective view of detail of construction formedfrom the' blank 6, and Fig. 9 is a perspective view of another detail.

The stock that is, the bodyof the plane is preferably formed of sheetmetal, in which the bottom portion 1 and the sides or checkpieces 2 2may be formed from a blank of a single thickness of sheet metal ofproper shapefor example, such a shape as shown in Fig. 6. In thepreferable construction this blank is first bent upwardly or crowned,and

the sides are also bent upwardly, so as to give "to the blank the shapeindicated in Fig. 7. When the bottom or floor 1 is flattened down,

it will cause the sides or cheek-pieces 2 2 to converge, so that theywill assume practically a vertical position. Manifestly the manipulationof the metal in order to produce the desired form may be modified invarious ways. In practice it is customary to provide a transversepassage in the bottom or floor 1, termed the throat," through which thecutting edge of the plane-iron projects in use. The throat 3 isindicated in dotted outline in Fig. 6 and may be formed at any time,either before or after the shaping of the stock.

In the operation of planes of any considerable size it is customary touse both hands, and to that end two handles are usually employed. In thedrawings, 1 is a rear handle, and 5 is a knob constituting aforwardhandle.

The knob 5 may be carried upon a plate 6, which performs the doublefunction of supporting said knob and of reinforcing and strengtheningthe floor of the said stock. This plate 6 is provided, bypreference,with an integral angular bend 7 at its rear edge so positionedrelatively to the throat 3 as to stand closely in front of the same, asbest seen in the sectional view Fig. 2. This angular bend also serves tofurther stiffen the floor directly adjacent to the throat. The handle 4is carried by the plate 8, which performs the double function ofsupporting said handle and of reinforcing the floor 1 to the rear of thethroat 3.

9 is a supporting chair or bearing, preferably formed near the forwardedge of the plate 9, giving further strength to the parts and performingan additional functionto wit, that of a bearing for the frog 10, againstwhich the plane-iron, hereinafter referred to, is clamped. In thepreferable construction the chair or bearing 9 is so formed that thefrog will rest upon the rear portion thereof. The forward end of thefrog 10 bears upon the floor 1 or upon an extension of the plate 8, ifit is-desired to extend said plate close to the throat.

1 1 is a screwbolt (any desired number may be provided) which serves toclamp the frog securely in place upon the two bearingsthe floor 1 andthe chair 9. The bolt 11 is so positioned that it is intermediate ofsaid bearings and will cause the frog to hug tightly thereon, thuspreventing chattering of the parts when in use. The frog 10 supports theplane-iron 1.2, which is clamped thereto by means of a cap-piece 13,which engages with a cap-screw 14, carried by the frog, said en gagementbeing effected in the usual manner.

17 is a cam carried by the cap-piece 13, the same being of the usualconstruction and performing the usual functionto wit, putting the partsunder such tension as to properly clamp the cap-piece and plane-ironagainst the frog.

15 is a lever carried by a portion of the frog and operated by anadjusting-nut 16, a portion of the lever engaging the plane-iron, sothat by means of the nut 16 said plane-iron may be adjusted accuratelyin the usual way.

I preferably employ a long plate 11 in place of an ordinary nut to coactwith the screw-bolt 11. This is a preferable construction,becauseusually two screw-bolts are employed, both of which may engage with saiding a nut 44.

plate 11*, which gives a broad bearing against the under side of theangular portion formed in the plate 8.

The plates 6 8 may be secured in place against the floor 1 in anywell-known manner. One method of attaching the plates is shown in Fig.3, in which the sides 2 2, close to the floor 1, may be milled out orundercut, and the edges of the plates 6 8 maybe correspondingly beveledto take into said undercut re' cesses. Thus by making a tight fit theplates 6 8 may be driven tightly into place to reinforce and strengthenthe floor. The handles 4 5 may be secured in any desired way; but bypreference I secure them by means of rivetbars 41 and 51, respectively.The heads of said rivet-bars engage in countersunk openings in theplates 8 6, respectively, while nuts 42 52 at the upper ends of saidrivet-bars serve to clamp the handles 4 5 thereon, respectively.

Additional clamping devices may be employedfor example, a screw-bolt 43,hav- By this arrangement it will be observed the superposed parts may besecurely fastened to the floor without projecting through the same, thusavoiding any danger of marring the Wood upon which the plane is used byreason of any irregular projections from the under side of the plane,the surface of which should be smooth and even.

Various modifications may be made with out departing from the spirit andscope of my invention, the essential feature of which is to provide aplane of such a construction that sheet metal may be utilized to formthe stock or body portion thereof, which stock or body portion willpossess all of the advantages of a cast-metal stock in addition to theadvantages inherent in the use of sheet metal. This invention permitsthe use of comparatively thin sheet metal in forming the stock, sincethe floor is of duplex construction, giving to it the desirable ornecessary thickness and strength.

What I claim is- 1. A plane comprising, a body formed of sheet metal andhaving a sole portion and integral upturned reinforcing-flanges formingthe sides, a reinforcing and strengthening plate secured between theside flanges having a stiffening-rib adjacent the throat and a handleseparately formed but secured to said reinforcing-plate.

2. A plane comprising a body portion having a sole and sides of sheetmetal integral therewith and reinforcing and strengthening platessecured in place against the top of the sole and between the sideshaving stiffeningribs adjacent the throat and handle members for saidplates, a frog mounted above one of said plates and means for adjustingsaid frog.

3. A plane comprising a body portion having a sole and sides of metalintegral therewith, and a reinforcing and strengthening piece situatedabove the sole and between the sides, a chair portion integral therewithbetween the said sides and supported above the sole leaving a spacebeneath the seat of the chair, and. a separate frog mounted on saidchair and secured thereto.

4. A plane comprising a body portion formed of sheet metal and having asole and sides integral therewith, a sheet-metal chair portion supportedby the sole and mounted between the sides, a frog supported on saidchair, a pair of securingscrews passing through said frog and said chairand a single plate having screw-threaded openings to act as a nut forboth of said securing-screws.

5. A plane comprising, a body portion with integral upturned sideflanges, a chair portion supported by the sole and mounted between thesides having a recess below the same, afrog mounted on said chair, aplurality of securing-screws passing through said frog, and the top ofsaid chair, and a plate having screwthreaded openings mounted in therecess beneath said chair and coacting with all of the adjusting-screws.

6. A plane comprising a body portion formed of sheet metal and having asole and integral side flanges, a reinforcing plate mounted in a groovein the said side flanges and immediately above the sole portion butresting thereon, a chair portion integral with the reinforcing-plate anda frog mounted on the chair portion and secured thereto.

7. A plane comprising a body portion of sheet metal having a sole andupturned flange portions, a reinforcing-plate secured between said sideflanges and coacting with the upper surface of the sole portion, asupporting-chair formed integrally with the reinforcing-plate andmounted between the side flanges and a frog mounted upon the said chair.

8. A plane comprising the combination of a body portion havingupwardly-extending reinforcing side flanges and a throat between saidflanges, means for mounting a plane-iron and a reinforcing-platesupported above the bottom of said body portion and having an integralbend or reinforcing portion 7 immediately in front of said throat.

Signed at New York this 25th day of March, A. D. 1902.

CHARLES E. MITCHELL.

Witnesses:

R. C. MITCHELL, RoBT. S. ALLYN.

